Home / 15,861.11-21,890.13-11,078.06

Finding the Fourth Proportional to 15,861.11, 21,890.13 and 11,078.06

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Solution

The fourth proportional to 15,861.11, 21,890.13 and 11,078.06 is: 15,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.11 : 21,890.13 = 11,078.06 : x
  2. Step 2: Convert to fraction form
    15,861.11/21,890.13 = 11,078.06/x
  3. Step 3: Cross multiply
    15,861.11x = 21,890.13 × 11,078.06
  4. Step 4: Simplify right side
    15,861.11x = 242,500,173.55
  5. Step 5: Solve for x
    x = 242,500,173.55/15,861.11
  6. Step 6: Final answer
    x = 15,288.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.